Re: maxextents

From: Igor Neyman <igor.neyman@xxxxxxxxx>

To: Thomas.Mercadante@xxxxxxxxxxxx

Date: Thu, 3 Mar 2011 14:54:42 -0500

>"datafiles that are currently larger than their maxtent size"
Confusion comes from the fact that PD mixes segment storage parameter
(MAXEXTENTS) with datafile AUTOEXTEND option.
Regards,
Igor Neyman
On Thu, Mar 3, 2011 at 2:43 PM, Mercadante, Thomas F (LABOR) <
Thomas.Mercadante@xxxxxxxxxxxx> wrote:
> PD,
>
>
> Well I’m confused about your question.
>
>
> For a physical data file, you can set the maximum file size to a specific
> size.
>
> You can also set the increment for the file that tells Oracle how much to
> grow the file by if it runs out of room.
>
>
>
> So if a file is 100M and you tell Oracle to increment it by 50M up to 300M
> and a table is growing in that tablespace/file, and you reach the 100M usage
> point, Oracle will allocate another 50M to the physical file growing it to
> 150M.
>
> This can happen a couple of times until the file reaches 300M. Oracle will
> then not automatically grow the file any more.
>
>
>
> Does this answer your question?
>
>
> Tom
>
>
>
>
>
> *From:* oracle-l-bounce@xxxxxxxxxxxxx [mailto:
> oracle-l-bounce@xxxxxxxxxxxxx] *On Behalf Of *P D
> *Sent:* Thursday, March 03, 2011 2:20 PM
> *To:* oracle-l@xxxxxxxxxxxxx
> *Subject:* RE: maxextents
>
>
>
> FYI - Blocksize=8192. Using auto allocate versus uniform.
>
>
>
> ------------------------------
>
> From: pdba1966@xxxxxxxxxxx
> To: oracle-l@xxxxxxxxxxxxx
> Subject: maxextents
> Date: Thu, 3 Mar 2011 13:34:58 -0500
>
> I am still confused by maxextents on a datafile and the more documentation
> and websites that I read the more confused that I get.
>
>
>
> If I have autoextend ON with NEXT set to 16384K then I understand that each
> time it has to extend it will extend in 16384K chunks.
>
>
>
> However, does maxsize value mean it will continue to allocate in those
> 16384K chunks until the total of those chunks reaches the size identified by
> maxsize? It doesn’t mean that maxextent is the total size the datafile can
> ever be (correct?) because I have some datafiles that are currently larger
> than their maxtent size...
>
>
>
> If you have NEXT set to 16384K, is there a recommendation of what size
> maxextents should be or is it just whatever you want to put it at? For
> example, does it need to be a multiple of block size or next extent, etc.
>
>
>
> When I use OEM and try and set Maximum Size to Unlimited and hit apply, it
> doesn’t show up with the Unlimited bullet highlighted. Instead it shows up
> as Value=32767MB. Why is that? Is 32GB the largest a datafile is ever
> supposed to be?
>
>
>
> This is 11.1.0.7 on RHEL5.
>